P BLOCK (GR:13-18)

1. The element which exists in liquid state for a wide range of temperature and can be used
for measuring high temperature is

A) B B) Al C) Ga D) In

2. Which of the following is a Lewis acid?

A) AlCl! B) MgCl" C) CaCl" D) BaCl"

3. The geometry of a complex species can be understood from the knowledge of type of
hybridisation of orbitals of central atom. The hybridisation of orbitals of central atom in
[B(OH)4]# and the geometry of the complex are respectively

A) 𝑠𝑝! , tetrahedral B) 𝑠𝑝! , square planar

C) 𝑠𝑝! 𝑑 " , octahedral D) 𝑑𝑠𝑝" , square planar

4. Which of the following oxides is acidic in nature?

A) B" O! B) Al" O!
C) Ga" O! D) In" O!

5. The exhibition of highest co-ordination number depends on the availability of vacant

orbitals in the central atom. Which of the following elements is not likely to act as central
atom in MF$!# ?

A) B B) Al C) Ga D) In

6. Boric acid is an acid because its molecule

A) contains replaceable H % ion

B) gives up a proton
C) accepts OH # from water releasing proton
D) combines with proton from water molecule

7. Catenation i.e., linking of similar atoms depends on size and electronic configuration of
atoms. The tendency of catenation in Group 14 elements follows the order:

A) C > Si > Ge > Sn

B) C ≫ Si > Ge ≈ Sn
C) Si > C > Sn > Ge
D) Ge > Sn > Si > C

8. Silicon has a strong tendency to form polymers like silicones. The chain length of silicone
polymer can be controlled by adding

A) MeSiCl! B) Me" SiCl"

P BLOCK (GR:13-18)

C) Me! SiCl D) Me& Si

9. Ionisation enthalpy (𝛥' H( kJmol#( ) for the elements of Group 13 follows the order.

A) B > Al > Ga > In > Tl B) B < Al < Ga < In < Tl

C) B < Al > Ga < In > Tl D) B > Al < Ga > In < Tl

10. In the structure of diborane

A) All hydrogen atoms lie in one plane and boron atoms lie in a plane perpendicular to this
plane.
B) 2 boron atoms and 4 terminal hydrogen atoms lie in the same plane and 2 bridging
hydrogen atoms lie in the perpendicular plane.
C) 4 bridging hydrogen atoms and boron atoms lie in one plane and two terminal hydrogen
atoms lie in a plane perpendicular to this plane.
D) All the atoms are in the same plane.

11. A compound X , of boron reacts with NH! on heating to give another compound Y which
is called inorganic benzene. The compound X can be prepared by treating BF! with Lithium
aluminium hydride. The compounds X and Y are represented by the formulas.

A) B" H$ , B! N! H$
B) B" O! , B! N! H$
C) BF! , B! N! H$
D) B! N! H$ , B" H$

12.The most commonly used reducing agent is

A) AlCl! B) PbCl" C) SnCl& D) SnCl"

13. Dry ice is

A) Solid NH! B) Solid SO"

C) SolidCO" D) Solid N"

14. The linear shape of CO" is due to (multiple correct)

A) 𝑠𝑝! hybridisation of carbon

B) 𝑠𝑝 hybridisation of carbon
C) 𝑝𝜋 − 𝑝𝜋 bonding between carbon and oxygen
D) 𝑠𝑝" hybridisation of carbon

15. Which of the following statements are correct?(multiple correct)

A) Fullerenes have dangling bonds

P BLOCK (GR:13-18)

B) Fullerenes are cage-like molecules

C) Graphite is thermodynamically most stable allotrope of carbon
D) Graphite is slippery and hard and therefore used as a dry lubricant in machines

16. Which of the following statements are correct(multiple correct) for Diborane

A) The two birdged hydrogen atoms and the two boron atoms lie in one plane;
B) Out of six B-H bonds two bonds can be described in terms of 3 centre 2 -electron bonds.
C) Out of six B-H bonds four B-H bonds can be described in terms of 3 centre 2 electron
bonds;
D) The four terminal B-H bonds are two centre-two electron regular bonds.

17. Identify the correct resonance structures of carbon dioxide from the ones given
below:(multiple correct)

A) O − C ≡ O
B) O = C = O
C) # O ≡ C − O%
D) −O − C ≡ O%

18. Which of the following pairs of ions are isoelectronic and isostructural?

A) CO"# #
! , NO! B) ClO# "#
! , CO!
C) SO"# #
! , NO! D) ClO# "#
! , SO!

19. Affinity for hydrogen decreases in the group from fluorine to iodine. Which of the
halogen acids should have highest bond dissociation enthalpy?

A) HF B) HCl C) HBr D) HI

20. Bond dissociation enthalpy of E − H(E = element ) bonds is given below. Which of the
compounds will act as strongest reducing agent?

Compound 𝐍𝐇! 𝐏𝐇! 𝐀𝐬𝐇𝟑 𝐒𝐛𝐇!

𝛥diss (E − H)/kJmol#( 389 322 297 255

A) NH! B) PH! C) AsH! D) SbH!

21. Which of the following acids forms three series of salts?

A) H! PO" B) H! BO!
C) H! PO& D) H! PO!
P BLOCK (GR:13-18)

22. Which of the following elements does not show allotropy?

A) Nitrogen B) Bismuth C) Antimony D) Arsenic

23. Maximum covalency of nitrogen is

A) 3 B) 5 C) 4 D) 6

24. Which of the following statements is wrong?

A) Single N − N bond is stronger than the single P − P bond.

B) PH! can act as a ligand in the formation of coordination compound with transition
elements.
C) NO" is paramagnetic in nature.
D) Covalency of nitrogen in N" O* is four.

25. Elements of group-15 form compounds in +5 oxidation state. However, bismuth forms
only one well characterised compound in +5 oxidation state. The compound is

A) Bi" O* B) BiF*
C) BiCl* D) Bi" S*

26. In the preparation of HNO! , we get NO gas by catalytic oxidation of ammonia. The moles
of NO produced by the oxidation of two moles of NH! will be .

A) 2 B) 3 C) 4 D) 6

27. The oxidation state of central atom in the anion of compound NaH" PO" will be .

A) +3 B) +5 C) +1 D) −3

28. Which of the following is not tetrahedral in shape?

A) NH&% B) SiCl&
C) SF& D) SO& "#

29. Which of the following are peroxoacids of sulphur?

A) H" SO* and H" S" O+

B) H" SO* and H" S" O,
C) H" S" O, and H" S" O+
D) H" S" O$ and H" S" O,

30. In the preparation of compounds of Xe, Bartlett had taken O% #

" Pt $ as a base compound.
This is because

A) both O" and Xe have same size.

P BLOCK (GR:13-18)

B) both O" and Xe have same electron gain enthalpy.

C) both O" and Xe have almost same ionisation enthalpy.
D) both Xe and O" are gases.

31. In solid state PCl* is a

A) covalent solid
B) octahedral structure
C) ionic solid with [PCl$ ]% octahedral and [PCl& ]# tetrahedra
D) ionic solid with [PCl& ]% tetrahedral and [PCl$ ]# octahedra

32. Reduction potentials of some ions are given below. Arrange them in decreasing order of
oxidising power.
Ion
ClO#
&

IO#
&

BrO#
&

Reduction
𝐸 ⊖ = 1.19V
𝐸 ⊖ = 1.65V
𝐸 ⊖ = 1.74V
potential 𝐸 ⊖ /𝑉

A) ClO# #
& > IO& > BrO&
#

B) IO# #
& > BrO& > ClO&
#

C) BrO# #
& > IO& > ClO&
#

D) BrO# # #
& > ClO& > IO&

33. Which of the following is isoelectronic pair?

A) ICl" , ClO" B) BrO# %

" , BrF"
C) ClO" , BrF D) CN # , O!

34. Which of the following statements are correct?(multiple correct)

A) S-S bond is present in H" S" O$ .

B) In peroxosulphuric acid (H" SO* ) sulphur is in +6 oxidation state.
C) Iron powder along with Al" O! and K " O is used as a catalyst in the preparation of NH! by
P BLOCK (GR:13-18)

Haber’s process.
D) Change in enthalpy is positive for the preparation of SO! by catalytic oxidation of SO" .

35. In which of the following reactions conc. H" SO& is used as an oxidising
reagent?(multiple correct)

A) CaF" + H" SO& → CaSO& + 2HF

B) 2HI + H" SO& → I" + SO" + 2H" O
C) Cu + 2H" SO& → CuSO& + SO" + 2H" O
D) NaCl + H" SO& → NaHSO& + HCl

36. Which of the following statements are true?(multiple correct)

A) Only type of interactions between particles of noble gases are due to weak
dispersion forces.
B) Ionisation enthalpy of molecular oxygen is very close to that of xenon.
C) Hydrolysis of XeF$ is a redox reaction.

37. Which among the following is tear gas?

A) COCl"
B) ClCH" CH" SCH" CH" Cl
C) CCl! NO"
D) CH! Cl

38. Shape of XeO! is

A) Pyramidal B) T-shaped C) Planar D) Tetrahedral

39. Transition temperature of 𝛼 and 𝛽 Sulphur is

A) 393 K B) 369 K C) 375 K D) 383 K

40. Ostwald’s piocess is used for the preparation of

A) NH! . B) H" SO&

C) HNO! D) Cl"

41. Cl" on reaction with cold and dilute NaOH gives NaCl and

A) NaOCl B) NaClO! C) NaClO& D) NaClO"

42. In brown ring test for nitrate ions, brown ring is formed having composition

A) [Fe(H" O)$ ]"%

B) [Fe(H" O)* NO]"%
P BLOCK (GR:13-18)

C) [Fe(H" O)* NO]!%

D) [Fe(H" O)* NO" ]"%

43. Halogen molecule having lowest bond energy is

A) F" B) Cl" C) Br" D) 𝑙"

44. On heating (NH& )" Cr" O, , which of the following is not formed?

A) NH! B) N"
C) H" O D) Cr" O!

45. The highest ionisation energy among the noble gases is of

A) He B) Ne C) Ar D) Kr

46. Hydride of group 15 elements of highest boiling pointis

A) NH! B) PH! C) SbH! D) BiH!

47. Given below are two statements.

Statement I: Chlorine water on standing loses its/yellow colour.
Statement II: Chlorine in presence of water is a powerful bleaching agent.
In the light of above statements, choose the most appropriate answer from the options
given below.

A) Both statement I and statement II are correct

B) Both statement I and statement II are incorrect
C) Statement I is correct but statement II is incorrect
D) Statement I is incorrect but statement II is correct

48. Correct order of basicity of hydrides is

A) NH! > BiH! > SbH! > AsH! > PH!

B) NH! > PH! > AsH! > SbH! > BiH!
C) BiH! > NH! > SbH! > AsH! > PH!
D) BiH! > SbH! > AsH! > PH! > NH!

49. On complete hydrolysis of XeF6, hybridization of Xe changes from

A) 𝑠𝑝" to 𝑠𝑝! B) 𝑠𝑝 to 𝑠𝑝!

C) 𝑠𝑝! 𝑑 ! to 𝑠𝑝" D) 𝑠𝑝! 𝑑 ! to 𝑠𝑝!

50. Bleaching action of SO" is due to.

P BLOCK (GR:13-18)

A) oxidising nature B) Reducing nature

C) Acidic nature D) Basic nature

51. Maximum number of H -bonds formed by one molecule of H" O

A) 1 B) 2 C) 3 D) 4

52. Which of the following hormones contains iodine?

A) Thyroxine B) Insulin C) Testosterone D) Adrenaline

53. Number of 3 centre −2e# bonds present in B" H$ is

A) 2 B) 1 C) 4 D) 3

54. Given below are two statements one is assertion (A) other is reason (R).
Assertion: +2 oxidation state of Pb is more stable than +4 oxidation state.
Reason: Pb shows inert pair effect.
In the light of above statements, choose the correct answer.

A) (1) Both Assertion & Reason are true and the reason is the correct explanation of the
assertion
B) Both Assertion & Reason are true but the reason is not the correct explanation of the
assertion
C) Assertion is true statement but Reason is false
D) Both Assertion and Reason are false statements

55. Match List I with List II and select the correct option, Llist I (Formula)
List II (Name)
b. H! PO!
c. H& P" O*
d. H& P" O$
a. H! PO" (I) Hypophosphoric acid
ii) Phosphinic acid
iii) ’Pyrophosphorous acid
iv) Phosphonic acid

A) a(iv), b(i), c(ili), d(i)

B) 𝑎(𝑖𝑖), 𝑏(∣ 𝑣), 𝑐(𝑖), 𝑑(𝑖𝑖𝑖)
P BLOCK (GR:13-18)

C) 𝑎(𝑖), 𝑏(𝑖𝑖), 𝑐( (ii ), 𝑑(𝑖𝑣)

D) a(ii), b(lv), c( (iii ), d(i)

56. Which metal is used as catalyst in Haber’s process, for the synthesis of ammonia?

A) Cu B) V C) Co D) Fe

57. The hybridisation state of central atom of phosphonic acid is

A) 𝑠𝑝" B) 𝑠𝑝! C) 𝑠𝑝 D) 𝑠𝑝! 𝑑

58. Hydride of group-16 having lowest boiling point is

A) H" O B) H" S
C) H" Se D) H" Te

59. Partial hydrolysis of XeF$ gives

A) Xe
B) XeOF& and XeO" F"
C) XeO" F" only
D) Y ⋅ O

60. The P-P-P bond angle in white phosphorous is

A) 90∘ B) 180∘ C) 60∘ D) 120∘

61. Oxoacids of sulphur which has peroxy linkage, is

A) H" S" O, B) H" S" O+

C) H" S" O$ D) H" S" O*

62. Given below are two statements: One is labelled as Assertion (A) and other is labelled
as Reason (R).
Assertion (A) : The bond angle of NH! is greater than BiH! .
Reason (R) : ’Bi’ is metal while ’ 𝑁 ’ is non-metal.
In the light of above statements, choose the most appropriate answer from the options
given below.
Both assertion (A) and reason ( 𝑅 ) are correct

A) Both statements are correct and reason is the correct explanation of the assertion.
B) Both statements are correct but reason is not the correct explanation of the assertion.
C) Assertion (A) is correct, but reason (R) is wrong statement.
D) Assertion (A) is wrong, but reason (R) is correct statement.
P BLOCK (GR:13-18)

63. Given below are two statements: One is labelled as Assertion (A) and other is labelled
as Reason (R).
Assertion (A) : NH! has higher boiling point than PH! .
Reason (R) : In NH! , hydrogen bonding exist.
In the light of above statements, choose the most appropriate answer from the options
given below.

A) Assertion and reason both are correct statements and reason is correct explanation for
assertion
B) Assertion and reason both are correct statements but reason is not correct explanation
for assertion
C) Assertion is correct statement but reason is wrong statement
D) Assertion (A) is wrong, but reason (R) is correct statement.

64.The geometry of the following molecules with respect to central atom is respectively
N(SiH! )! , Me! N, (SiH! )! P

A) planar, pyramidal, planar

B) planar, pyramidal, pyramidal
C) pyramidal, pyramidal, pyramidal
D) pyramidal, planar, pyramidal

65.The hybridization of boron in diborane is -

A) sp B) sp" C) 𝑠𝑝! D) sp! d"

66.Which one of the following oxy acid of fluorine exists?

A) HOF B) HFO! C) HFO& D) HFO"

67.Which compound does not exist?

A) TlCl! B) TII! C) BiF* D) PbI&

68.Borax Na" B& O, ⋅ 10H" O is actually :-

A) Na" [B& O* (OH)& ] ⋅ 8H" O

B) Na" [B& O& (OH)$ ] ⋅ 7H" O
C) Na" [B& O! (OH)+ ] ⋅ 6H" O
D) Na" [B& O" (OH)(0 ] ⋅ 5H" O
P BLOCK (GR:13-18)

69.Potash alum is a double salt made up of two salts:

A) Salt of a (𝑆𝐴 + 𝑊𝐵) + Salt of a (𝑊𝐴 + 𝑊𝐵)

B) Salt of a (SA + SB) + Salt of a (SA + WB)
C) Salt of a (𝑆𝐴 + 𝑆𝐵) + Salt of a (𝑊𝐴 + 𝑊𝐵)
D) Salt of a (𝑆𝐴 + 𝑊𝐵) + Salt of a (𝑊𝐴 + 𝑊𝐵)

70.In Borax bead test, bead of cobalt is-

A) Co(BO" )" , Pink

B) Co(BO" )" , Blue
C) Co(BO! )" , Pink
D) Co(BO! )" , Blue

71.Correct IE order is -

A) C > Si > Ge > Sn > Pb B) C < Si < Ge < Sn > Pb

C) C > Si > Ge > Sn < Pb D) C < Si < Ge < Sn < Pb

72.Which stability order is incorrect

A) Pb%" > Pb%& B) Sn%" > Sn%&

C) Sn%" < Pb%" D) Sn%& > Pb%&

73.Nature of GeO" is

A) Acidic B) Basic C) Amphoteric D) Neutral

74.Catenation property is mainly exhibited by carbon in its family but it is not shown by its
member

A) Si B) Ge C) Sn D) Pb

75.Which among the following statements is incorrect regarding graphite?

A) Each carbon atom is sp" hybridised

B) Fourth electron on each carbon atom forms a 𝜋 bond.
C) Layers are held by weak van der Waals forces
D) Thermodynamically less stable than diamond

76.Haber’s process is used in manufacturing of -

A) ammonia B) Sadium azide C) phosphine D) None

77. NH! act as a -

A) Lewis acid B) Lewis base C) Amphoteric D) None

P BLOCK (GR:13-18)

78.Which does not show Allotropy

A) N B) P C) Sb D) Bi

79.In which compound covalency of N is 4 .

A) N" O* B) N" O&

C) N" O! D) All of these

80. SO" can acts as -

A) Reducing agent B) Oxidising agent

C) Bleaching agent D) All

81.When KBr is treated with conc. H" SO& reddish brown gas is evolved. The gas is :

A) Br" B) HOBr
C) NO" D) H" O"

82. On addition of conc. H" SO& to a chloride salt, colourless fumes are evolved but in case of
iodide salt, violet fumes come out. This is because:-

A) H" SO& reduces HI to I"

B) HI is of violet colour
C) HI gets oxidised to I"
D) HI changes to HIO!

83. Which 16th group element have only positive oxidation state only

A) S B) Se C) Te D) Po

84. The oxidation state of central atom in the anion of compound NaH" PO" will be :

A) +3 B) +5 C) +1 D) -3

85. Arrange the following in decreasing order of their boiling Point?

I. H" O
II. H" S
III. H" Se
IV. H" Te

A) IV > III > II > I B) II > III > IV > I

C) I > IV > III > II D) I > II > III > IV
P BLOCK (GR:13-18)

86. Which hydride does not shows reducing property

A) H" Te B) H" Se
C) H" S D) H" O

87. True statement regarding halides of group 16 is-

A) Hexafluorides are the only stable halides

B) All hexafluorides are gaseous in nature.
C) All hexafluorides shows octachedral structure
D) All of these

88. Contact process is used for manufacturing of -

A) HNO! B) H" SO&

C) H" S" O" D) None

89. The halide which does not give a precipitate with AgNO! is-

A) F # B) Cl# C) Br # D) 𝐼 #

90. XeF" reacts with SbF* to form :

A) [XeF]% [SbF$ ]#
B) [XeF! ]# [SbF& ]#
C) Xe# [PtF$ ]%
D) XeF&

91. The compound that cannot be formed by xenon is

A) XeO! B) XeF&
C) XeCl& D) XeO" F"

92. An inorganic salt when heated with concentrated H" SO& evolves a colourless pungent
smelling gas but with concentrated H" SO& and MnO" evolves a coloured pungent smelling
gas which bleaches moist litmus paper. The coloured gas is :-

A) NO" B) Cl" C) Br" D) 𝐼"

93. Salt producing family is -

A) Nitrogen family B) Carbon family

C) Halogen family D) Inert gas
P BLOCK (GR:13-18)

94. Correct order of bond dissociation enthalpy is -

A) HF > HCl > HBr > HI B) HF > HBr > HCl > HI
C) HI > HBr > HCl > HF D) None

95. Which is used in estimation of CO-

A) ClO" B) Br" O
C) I" O* D) all of these

96. Catalyst used in Deacon’s process is -

A) CuCl" B) Cu" Cl" C) Pt wire D) Ni powder

97.Number of O-O bond in perchloric acid will be-

A) 4 B) 3 C) 2 D) Zero

98. Which one of the following is not formed during hydrolysis of XeF$ ?

A) XeOF& B) XeOF!
C) XeO! D) XeO" F"

99. Oxidation states of P in H& P" O* , H& P" O$ , H& P" O, , are respectively :-

A) +3, +4, +5 B) +3, +5, +4 C) +5, +3, +4 D) +5, +4, +3

100. Which of the following oxide is amphoteric :-

A) CO" B) SnO" C) CaO D) SiO"

101. Strong reducing behaviour of H! PO" is due to :

A) High oxidation state of phosphorus

B) Presence of two -OH groups and one P − H bond
C) Presence of one -OH group and two P − H bonds
D) High electron gain enthalpy of phosphorus

102.The stability of +1 oxidation state among Al, Ga, In and TI increases in the sequence :

A) TI < In < Ga < Al B) In < TI < Ga < Al

C) Ga < In < Al < TI D) Al < Ga < In < TI

103. AlF! is soluble in HF only in presence of KF . It is due to the formation of

A) AlH!
B) K[AlF! H]
C) K ! [AlF! H! ]
P BLOCK (GR:13-18)

D) K ! [AlF$ ]

104. It is because of inability of ns " electrons of the valence shell to participate in bonding
that:-

A) Sn"% is oxidising while Pb&% is reducing

B) Sn"% and Pb"% are both oxidising and reducing
C) Sn&% is reducing while Pb&% is oxidising
D) Sn"% is reducing while Pb&% is oxidising

105. Identify the correct formula of oleum from the following

A) H" S" O, B) H" SO!

C) H" SO& D) H" S" O+

106. The bonds present in borazole are

A) 12𝜎, 3𝜋 B) 9𝜎, 6𝜋
C) 6𝜎, 6𝜋 D) 9𝜎, 9𝜋

107. Given below are two statements:

Statement I :
The boiling points of the following hydrides of group 16 elements increases in the order -
H" O < H" S < H" Se < H" Te
Statement II:
The boiling points of these hydrides increase with increase in molar mass.
In the light of the above statements, choose the most appropriate answer from the options
given below:

A) Both Statement I and Statement II are incorrect

B) Statement I is correct but Statement II is incorrect
C) Statement I is incorrect but Statement II is correct
D) Both Statement I and Statement II are correct

108. Choose the correct statement :

A) Diamond is covalent and graphite is ionic.

B) Diamond is sp! hybridised and graphite is sp" hybridized.
C) Both diamond and graphite are used as dry lubricants.
D) Diamond and graphite have two dimensional network.
P BLOCK (GR:13-18)

109. Flourine is a stronger oxidising agent than chlorine because :

a) F-F bond has a low enthalpy of dissociation.
b) Flouride ion ( F ) has high hydration enthalpy.
c) Electron gain enthalpy of flourine is less negative than chlorine.
d) Flourine has a very small size.
Choose the most appropriate answer from the options given :

A) ) (a) and (b) only B) (a) and (c) only

C) (a) and (d) only D) (b) and (c) only